/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
Computes the Paint power multiplier value
static float ComputePaintMultiplier ( float SquaredDistanceToVertex2D, float BrushStrength, float BrushInnerRadius, float BrushRadialFalloff, float BrushInnerDepth, float BrushDepthFallof, float VertexDepthToBrush )